Unit type chemical freezing package



Dec. 15, 1959 A. A. ROBBINS 2,916,886

UNIT TYPE CHEMICAL FREEZING PACKAGE Original Filed June 15, 1956INVENTOR. 4455174 ffi/A f,

. being either in the form of Un d Stats? etsfl .0;

masts UNIT TYPE airmen. FREE ZIlWG PACKAGE 2 Claims. (Cl. 62-4) 1956,Serial This invention relates toa chemical freezing package, andparticularly to a package in which the chemicals, or the water and achemical, can be easily and simply mixed when it is desired to reducethe temperature of the package and, consequently, of the surroundingarea.

An object of my invention is to provide a novel chemical freezingpackage of the unit type, consisting of an outer envelope which isdivided into compartments, and with a physical means within one of thecompartments which perforates or severs the wall or partition betweenadjacent compartments.

Another object of my invention is to provide a novel chemical freezingpackage of the unit type which includes an outer integral envelope, theenvelope being divided into adjacent compartments, and with a toothed orpointed frame positioned in one compartment to em able the user toperforate or sever the wall or partition between the adjacentcompartments of the package.

Still another object of my invention is to provide a novel chemicalfreezing package of the unit type in which the ingredients positioned inthe separated compartments of the package can be intermingled bymanually 'causingthe separating wall or partition inthe package to bebrokenor perforated, said perforation or severing of the dividing2,916,886 Patent d Dec. 15, 1959 2 H ing airlor to adjacent articles.Consequently, a package containing any of the freezing mixtures whenenclosed in abbx, carton, hamper, or container will lower the tem-Serial No. 591,758.

per'ature therein and will maintain a low temperature in foods, liquids,cans, bottles, etc., which are placed within the containers, etc. r

This application isa division of my application, Serial No. 591,758,filed June 15, 1956, for Chemical Freezing Package.

' In order that the freezing package may be easily transported and,further, that it may be activated to reduce temperature at any timedesired, I provide a chemical freezing package as follows: An outerenvelope or hous ing 1 is preferably formed of a plastic sheet material,such as polyethylene, vinyl or acetate. This plastic sheet material isusual and well known in the industry and the sheets are formed ofsufficient thickness so that they will not easily tear or break.Further, the plastic sheet is sufficiently dense so that gases will notreadily pass therethrough. .By gases is meant ammonia, chlorine, etc.The envelope 1 is preferably formed by heat sealing the edges 2, or bymeans of a suitable adhesive so that a completely enclosed envelope isprovided. The envelope 1 is formed into two compartments 3 and 4 by asealed strip 5, this sealed strip being breakable or may be parted toprovide communication between the compartments 3 and 4. The sealingpartition or strip 5 has less strength than the outer sealed area 2 sothat the envelope 1 will not be ruptured by any manipulation necessaryto open, break, or sever the strip 5 in order to pro vide communicationbetween the compartments 3 and 4. The compartment 4 is filled with asalt 6 which is termed a freezing mixture, as specified above. Thesealing strip 5 is formed bya heated iron or some other suitable sealinginstrument, or by applying an adhesive so that the compartments 3 and 4are separate and distinct, except when the'strip 5 is severed. Thecompartment 3 may 7 contain free water, or it may contain a chemicalwhich wall or partition being accomplished manually by the user, theuser actuating a pointed frame or article within one of the compartmentsof the package.

Other objects, advantages and features of invention may appear from theaccompanying drawing, the subjoined detailed description and theappended claims.

In the drawing:

Figure 1 is a side elevation of my freezing package of the unit type. pt

Figure 2 is a fragmentary side elevation of my freezing package andillustrating the breaking or perforating of the separating seam strip orpartition of the package.

Figure 3 is a fragmentary vertical sectional view of my freezingpackage.

It is well known in the chemical art that certain chemicals absorb heatwhen water is added thereto, this water free water or water molecules ina chemical substance. The absorbed heat is obtained from adjacent bodiesby means of conduction, convection or radiation, or possibly all three.The chemicals will be termed freezing mixtures in the followingspecifics;

tion and may include any of the following chemicals, or many othershaving the same property; Some of these freezing mixtures have thefollowing formulae:

Nac,H 0 NH C1 NaNO- N32830:; KI

cacl, Mario,

The addition of water to any of these chemicals will cause a markedreduction in temperature in the surround- 65 pushed through the dividingstrip to permit intermingling has any available free-water molecule. Topermit the intermingling of the water and the freezing mixture 6, Iprovide a frame 7 which is formed with one or more pointed or sharpcomb-like fingers 8, which fingers normally rest on the dividing strip 5as shown in Figure 1. By applying manual pressure to the top of theframe 7 the fingers 8 are forced through the dividing strip 5, as shownin Figure 2. This provides communication between the compartments 3 and4 and permitting water to drain into the freezing mixture 6 and mixtherewith. If a hydrous chemical is used in one of the compartments,such as sodium carbonate (Na CO +5-10H O) then the two chemicals willintermix and the free water in the hydrous chemical will activate thefreezing mixture.

Having described my invention, I claim;

1. A chemical freezing package comprising a rectangular envelope formedof a thin flexible plastic material, the peripheral edges of saidenvelope being all sealed to prevent leakage of material therefrom, adividing strip extending transversely across the outer envelope, saiddividing strip being formed by sealing the walls of theenvelope-together along said strip whereby said envelope is divided intotwo separate compartments, a dry freezing chemical mixture in one ofsaid compartments, a quantity of fluid in the other of saidcompartments, perforating means loosely positioned entirely within oneof said compartments, said perforating means having a tooth thereon, thetooth being adapted and arranged to be of the fluid and the chemicalfreezing mixture.

2. A chemical freezing package comprising a rectangular envelope formedof a thin flexible plastic material, the peripheral edges of saidenvelope being all sealed to prevent leakage of material therefrom, adividing strip exh tending transversely across the outer envelope, saiddividing strip being formed by sealing the walls of the ento be pushedthrough the dividing strip to permit intervelope together along saidstrip whereby said envelope is mingling of the fluid and the chemicalfreezing mixture. divided into two separate compartments, a dry freezingchemical mixture in one-of said compartments, a quantity ReferencesCited in the file of this P of fluid in the other of said compartments,a perforating 5 UNITED STATES PATENTS means loosely positioned entirelywithin one of said com- 1 897 723 Free Feb 14 1933 partments, sharpenedprojections on the perforating Taylo; June 1941 means, said sharpenedprojections being positioned adu jacent the dividing strip and extendingtowards the di- FOREIGN PATENTS viding strip, said projections beingadapted and arrange 10 1,054,170 France Oct. 7, 1953

